Improvement in circular files



B. D. WHITNEY.

Circular Files.

Patented Feb.17.1874.

Fig. 7.

Inventor.-

Fig. 1.

v Fly. 2.

UNITED STATES PATENT GEEIGE..

BAXTER D. VHITNEY, OF YVINCHENDON, MASSACHUSETTS.

IMPROVEMENT IN CIRCULAR FiLES.

Speeiiii-ation forming part of Letters Patent No. 147,535, datedllebruary l?, 1874; application tiled November 19, 1873.

` the method of holding the same 5 and the fol lowing is a full, clear,and exact description of the same, reference being had to theaccompanying drawings, making a partof this specitcation, in which-Figure l represents .a sidc view ot` the rotating tile, collars, nut,and mandrel. Fig. 2 is an end view of the same, showing the open spacebetween the two ends of the file. Fig. 3 is a sectional View of Fig. l.Fig. el. shows the mandrel and stationary collar. Fig. 5 shows an edgeview of the tile detached. Fig. 6 is an edge view of the movable collar.Fig. 7 is an edge view of the nut.

My invention consists in the construction and method of holding a. tilefor saw-tiling machines.

The mandrel A made with a stationary collar, B, which is provided withan angular projection, a, which engages a corresponding angle in the leC. A portion of the collar l5 extends inside and supports the lile, asshown in Fig. 3. D is a movable collar, which is pressed against thefile ,G by the screw-nut E on the mandrel A, which holds the file G securely in its place.

The advantages of my inventions are, the cheapncss and perfection withwhich the tiles can be produced.

The lile is made of a pic'ce of steel rolled to the same section ot' thefinished file, and cut the proper length, and is then bent to a circularform by dies. The file being of equal section the entire length, thereis very little tendency to spring iu tempering, and the shrinkage intempering does not prevent the iile from iitting the circle of thegrasping parts ot' the collar, the opening allowing the file suflieientadjustment, which it would not have it' it was a complete circle.

l. The annular tile C, having an opening, G, for adjustment, andanannular groove or projection to lock it to the holdin g-collar,substantially as described.

2. The combination ot' the fixed collar B, having an angular projection,a, the circular tile (l, and the movable collar I), constructed andoperating to lock and hold the same, suhstantially as described.

BAXTER D. VHITNEY.

ll'litnesses:

J. B. WoonnUrr, S. KEMoN.

